Device for turning off commutators of dynamos or motors



(No ModeL) 2 Sheets-Sheet 1.

W. H. JORDAN.

DEVICE FOR TURNING OPP UOMMUTATORS 0F DYNAMOS 0R MOTORS.

Patented Apr. 26, 1898.

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(No Model.) 2 Sheets-Sheet 2.

W. H. JORDAN. DEVICE FOR TURNING OFF GOMMUTATORS 0P DYNAMOS 0R MOTORS. No. 603,061. Patented Apr. 26, 1898.

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UNITED STATES PATENT OFFICE.

\VILLIAM l-I. JORDAN, OF BROOKLYN, NElV YORK.

DEVICE FOR TURNING OFF COMMUTATORS OF DYNAMOS OR MOTORS.

SPECIFICATION forming part of Letters Patent No. 603,061, dated April 26, 1898.

Application filed January 28, 1897. Serial No. 621,031. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM H. JORDAN, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented a certain new and useful Improvement in Devices for Turning Off Commutat-ors of Dyna-mos or Motors, of which the following is a specification.

The object of my invention is to provide a device by means of which commutators of dynamos and motors may be turned off when worn or damaged without the necessity of removing the armature of the machine.

In carrying my invention into effect I employ an emery-wheel which is suitably supported by the yoke which carries the com in utator-brushes, and which emery-wheel is rotated through the rotation of the armature.

In the accompanying drawings,which illustrate my invention, Figure 1 is a plan view of a commutator and my improved device; Fig. 2, an end view of the parts shown in Fig. 1; Fig. 3, an elevation of an attachment for supporting the turning-off device where it is inconvenient to support the device from the yoke for the commutator-brushes; Fig. 4, a plan view of the same; Fig. 5, an enlarged sectional view of the shaft which carries the emery-wheel and the bearings for the same and the driving-pulley; Fig. 6, a plan view of a slightly-modified form of apparatus; Fig. 7, an end view of an apparatus similar to that shown in Fig. 1, but employing a frictiongear instead of a belt connection; and Fig. 8, a side view of a modified form of supporting device for the turning-0E apparatus.

Referring to the drawings, A represents the commutator, and B the emery-wheel, mounted upon a rotating and longitudinally-movable shaft 0. This shaft is carried by a bearingblock D, within which is a split bushing d d, made adjustable to the shaft by means of screw-bolts diworkin g through the outerbearing D. The bearingD is adj ustably secured to the slide E by a clamping-plate and bolts 6, by means of which the bearing D is made adjustable transversely of the slide E. The slide E is longitudinally movable upon a block f, formed integral with the support F. The slide is movable by means of the adj ustingscrew E, as in ordinary lathes, for the purpose of adjusting the emery-wheel toward and away from the commutator. The support F is adapted to be secured to one arm of the yoke G, which is the support for the commutator-brushes of the machine. The shaft O is rotated by a belt H, which passes around the end ring H of the commutator and around the pulley H, Fig. 5. This pulleyis secured to a bushing h by a pin 71,, which pin enters a channel h in the shaft 0 and whereby the shaft is caused to rotate with the pulley ll. By means of the channel 71, the shaft is free to be moved longitudinally through the bearing D while being rotated, so as to adjust the emery-wheel across the face of the commutator. To limit the longitudinal movement of the shaft O, I provide a ring 0, which is keyed to the shaft 0. The bushing h,which carries the pulley II, is held against displacement by a screw-pin 7L3, which passes through the bearing D and into a channel h in the bushing. Thus the bushing is free to rotate within the bearing D, but is held against displacement by the pin h In order to take up the slack in the belt II, I provide an idle-pulley I, which is carried by an arm I, projeoting from the collar 1 which is sleeved upon a reduced portion of the bearing D. (See Fig. The collar I is provided with a hole b through which the pin ha is inserted, the pin 72, being inserted far enough so as not to interfere with the movement of the collar on the bearing D. When necessary, the parts may be reversedthat is to say, if, for instance, the apparatus for some reason would have to be supported from the left-hand arm of the yoke at Fig. 1 it would be necessary to reverse the parts in order to bring the emerywheel properly to the face of the commutator. To accomplish this, the emery-wheel is removed f rom the shaft, and the pulley H,with its bushing h, and the collar 1 are removed. The shaft G is then removed from the bearing and reinserted from the opposite end to that illustrated in Fig. 1. The collar 1 is then placed upon the reduced portion m of the bearing, Fig. 5, and the bushings d and d are moved longitudinally through the bearing D, and the pulley H,with its bushing h, inserted at the right-hand end of the bearing, Fig. 5, and the parts secured in position as before.

I have found in practice that the shaft 0 is apt to vibrate or move away from the commutator when the emery wheel is moved across the commutator. This objection is more marked when the apparatus is used on long commutators. To avoid this, I provide an extra bearing for the shaft 0. This bearing is a rod 6, which enters the tubular por tion C of the shaft, Fig. 5. The red O is adj ustably supported by a standard G, which projects from a plate G and which plate is adjustably supported upon a clamping-plate G This last-named plate is adapted to be securely clamped to the bed-plate G of the dynam 0 or motor by suitable bolts and clamps, as shown in Figs. 3 and 4:. With some inachines the turning-off apparatus cannot be readily mounted upon the yoke G, and in such cases I employ another standard G, to which the support F is bolted.

In the apparatus shown in Fig. 6 the parts are identical with those illustrated in Fig. 1, except that a feed-screw J is provided for moving the emery-wheel across the face of the commutator. This screw works in a bearing J carried by the arm J which. moves with the shaft and within which the shaft is free to rotate. The free end of the screw works through an internally-sciew-threaded arm J rigidly mounted upon bearing I). From this illustration it will be seen that when the screw J is rotated and fed through the arm J the shaft 0 will be moved longitudinally through the bearing D.

In Fig. 7 the parts are identical with those of Fig. 1, except that a friction-wheel K is employed for imparting the rotation from the commutator to the pulley II instead of the belt connection. To hold the friction-wheel K firmly in contact with the commutatorring I1 and the pulley H, I provide a springpressed bearing, which is carried in a frame 7t, projecting from the bearing D.

In Fig. 8 a supporting-frame for the turning-off apparatus is illustrated, which eomprises two uprights L, which are adapted to be clamped to the yoke G, and these uprights L are provided with slots Z, in which work lugs Z, projecting from the cross-bar L,which cross-bar is adjustable upon the standards L by means of adjusting-screws Z The bear ing D is rigidly mounted upon the cross-bar L, and a belt II connects the pulley II with the commutator-ring H What I claim is 1. In a machine for turning off commutators of dynamos or motors, the combination of a tool carried by a rotating and longitudinallym ovable shaft, a bearing for said shaft ad justable toward and away from the commutator, a driving-wheel adapted to be jonrnaled on either end of said bearing and by means of which the shaft is rotated and. through which driving wheel the shaft is longitudinally movable, and a driving connection between said wheel and the commutator, substantially as and for the purpose set forth.

2. In a machine for turning off commutators of dynamos or motors, the combination of a tool carried by a rotating and longitudinallymovable shaft, a bearing for said shaft adj ustable toward and away from the commutator, a support for said bearing, a driving-wheel journaled on said bearing and by which the shaft is rotated and through which the shaft is longitudinally movable, a driving connection between said driving-wheel and the com mutator, and an extra adjustable bearing for one end of the tool-shaft, substantially as set forth.

3. In a machine for turning off commutators of dynamos or motors, the combination of a tool carried by a rotating and longitudinallymovable shaft, a bearing forsaid shaft adjustable toward and away from the commutator, a driving-wheel adapted to be journaled on either end of said bearing and by means of which the shaft is rotated and through which driving wheel the shaft is longitudinally movable, a driving connection between said wheel and the commutator, and means for limiting the longitudinal movement of the shaft through the bearing, substantially as and for the purpose set forth.

t. In a machine for turning off commutators of dynamos or motors, the combination of a tool carried by a rotating and longitudinallymovable shaft, said shaft being tubular at the one end, a bearing for said shaft adjustable toward and away from the commutator, a support for said bearing, a driving-wheel supported by said bearing and by which the shaft is rotated and through which the shaft is longitudinally movable, a driving connection between said driving-wheel and the commutator, and an adjustably-supported rod entering the tubular end of the shaft to form an additional bearing, substantially as set forth.

5. The combination with an apparatus for turning off com mutators, of an adjustable support therefor adapted to be clamped to the base of dynamos or motors, said support comprising a clamping-plate G a plate G adjustable thereon, and a standard G on said last-named plate, upon which the turning-off apparatus is adapted to be secured, substantially as set forth.

This specification signed and witnessed this 21st day of January, 1897.

WILLIAM II. JORDAN.

\Vitnesses:

W. PELZER, EUGENE CONRAN.

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